SC3200 datasheet(237/447 Pages) AMD

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AMD Geode™ SC3200 Processor Data Book

237

Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0

Revision 5.1

User Defined Device Idle Timer 1 (UDEF1) SMI Status. Indicates whether or not an SMI was caused by expiration of User

Defined Device 1 (UDEF1) Idle Timer Count Register (F0 Index A0h).

0: No.

1: Yes.

To enable SMI generation, set F0 Index 81h[4] = 1.

Keyboard/Mouse Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Keyboard/ Mouse

Idle Timer Count Register (F0 Index 9Eh).

0: No.

1: Yes.

To enable SMI generation, set F0 Index 81h[3] = 1.

Parallel/Serial Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Parallel/Serial Port Idle

Timer Count Register (F0 Index 9Ch).

0: No.

1: Yes.

To enable SMI generation, set F0 Index 81h[2] = 1.

Floppy Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Floppy Disk Idle Timer

Count Register (F0 Index 9Ah).

0: No.

1: Yes.

To enable SMI generation, set F0 Index 81h[1] = 1.

Hard Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Hard Disk Idle Timer Count

0: No.

1: Yes.

To enable SMI generation, set F0 Index 81h[0] = 1.

Index F6h

Second Level PME/SMI Status Register 3 (RC)

Reset Value: 00h

The bits in this register contain second level status reporting. Top level status is reported in F1BAR0+I/O Offset 00h/02h[0].

Reading this register clears the status at both the second and top levels.

A read-only “Mirror” version of this register exists at F0 Index 86h. If the value of the register must be read without clearing the SMI

source (and consequently de-asserting SMI), F0 Index 86h can be read instead.

Video Access Trap SMI Status. Indicates whether or not an SMI was caused by a trapped I/O access to the Video I/O

Trap.

0: No.

1: Yes.

To enable SMI generation, set F0 Index 82h[7] = 1.

Reserved. Reads as 0.

Secondary Hard Disk Access Trap SMI Status. Indicates whether or not an SMI was caused by a trapped I/O access to

the secondary hard disk.

0: No.

1: Yes.

To enable SMI generation, set F0 Index 83h[6] = 1.

Secondary Hard Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Secondary

Hard Disk Idle Timer Count register (F0 Index ACh).

0: No.

1: Yes.

To enable SMI generation, set F0 Index 83h[7] = 1.

Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support (Continued)

Bit

Description

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